No WAY! No HOW!

This app is horrible! I worked extremely hard on making my city awesome! And what happens? Half of my work is turned invisible! Wha? How? I dont know!!! I can see right through my buildings AND walk through them! They turn silver and I can see into the infinite ground! I need this fixed ASAP or theres gonna be some serious problems with me and the creator! ?????????????

Critical Criteria about Block Craft 3D: Building Games, v2.3.8